Irrigation water drainage unit



FIG. 1 is a perspective view of the irrigation water drainage unit showing my new design, with phantom lines showing how it is connected to a conduit;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is an elevational view of the front thereof;

FIG. 5 is an elevational view of the back thereof;

FIG. 6 is a left side elevational view thereof; and,

FIG. 7 is a right side elevational view thereof. 

The ornamental design for an irrigation water drainage unit, as shown. 